6821343 has 6 divisors (see below), whose sum is σ = 9853064. Its totient is φ = 4547556.

The previous prime is 6821303. The next prime is 6821383. The reversal of 6821343 is 3431286.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6821303) and next prime (6821383).

It is a de Polignac number, because none of the positive numbers 2^k-6821343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6821303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 378955 + ... + 378972.

Almost surely, 2^6821343 is an apocalyptic number.

6821343 is a deficient number, since it is larger than the sum of its proper divisors (3031721).

6821343 is a wasteful number, since it uses less digits than its factorization.

6821343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757933 (or 757930 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 6821343 is about 2611.7700894221. The cubic root of 6821343 is about 189.6516516595.

It can be divided in two parts, 682134 and 3, that multiplied together give a palindrome (2046402).

The spelling of 6821343 in words is "six million, eight hundred twenty-one thousand, three hundred forty-three".